If the car moves, you can go to a local auto parts store that can pull the DTC for you.
Check the car computer for any stored diagnostic trouble codes (DTC) in the computer that may point in the direction of the problem. Check the fuel pump fuse, fuel pump relay, and, if necessary, the wiring and other related sensors that the engine control module (ECM-car computer) relies on to activate the fuel pump, like the camshaft position sensor. If you don't hear this sound but the engine cranks when you try to start it, you may have a problem in the fuel pump electrical circuit. That means the pump is receiving power and it's responding. That's the sound of the fuel pump being energized. You should hear a whirring sound coming from inside the fuel tank for about two seconds. Ask an assistant to turn the ignition key to the ON position, but don't start the engine. Put your ear close to the fuel filler opening. If you can't hear the pump working, enlist the help of an assistant and follow the next steps: By turning the ignition key to the ON position (engine off), you should hear the fuel pump come alive with a swishing sound for about 2 seconds. Usually, you can do this test yourself from inside the vehicle. If the engine cranks but refuses to start, make sure that you actually have fuel in the tank.Ģ. This includes some obvious items and often forgotten common maintenance issues that may turn into a false "bad fuel pump" diagnostic.ġ. Testing for Fuel Pressure on a TBI Systemīefore testing the fuel pump, go over this checklist. If you listen carefully, you can hear the characteristic whine of the fuel pump momentarily activating on your vehicle when you turn the ignition key on.I. When the key is turned on, the powertrain control module (PCM) closes the fuel pump relay, which activates the fuel pump for about three seconds to pressurize the fuel injectors. The basic operating system for an electric fuel pump is relatively simple. Many fuel pump warranty returns could be eliminated if the technician simply followed a prescribed diagnostic procedure and understood how the various operating systems in the modern vehicle affect fuel pump operation. If the engine starts momentarily, the fuel delivery system is likely at fault. 
If the electrical part of the fuel system is functioning correctly, the next step might be simply to remove the engine’s air inlet and squirt some aerosol throttle body cleaner into the air intake. But let’s say the CKP, cranking speed and spark availability pass their initial tests.
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